California's Proposition 40 "Billionaire Tax" and the Nevada Side of Lake Tahoe: What Buyers Are Asking

By Cole Mizak, Compass | #1 agent by individual sales volume in Incline Village, 2025

TL;DR: California's Proposition 40, a ballot measure that would impose a one-time tax of up to 5% on the net worth of the state's billionaires, has qualified for the November 3, 2026 ballot. It targets a very small group — roughly 200 people — and would still need voter approval and would likely face constitutional challenges before ever taking effect. It does not directly affect the typical Incline Village buyer. But it has intensified a national conversation about wealth, taxes, and migration that was already drawing attention to the Nevada shore of Lake Tahoe. Here is a straight, non-partisan explanation of what the measure is, who it affects, and what it does and doesn't mean for people weighing a move.

This article is general information, not tax, legal, or voting advice. It is not an endorsement of or opposition to any ballot measure. Tax and residency outcomes are highly fact-specific — consult a qualified cross-border CPA or tax attorney about your situation.

What Proposition 40 actually is

Proposition 40, sometimes called the 2026 Billionaire Tax Act, is a citizen initiative that qualified for California's November 3, 2026 ballot after the Secretary of State's office verified the required signatures. It was placed on the ballot by a coalition led by a large California healthcare workers union, which gathered well over the roughly 875,000 signatures needed.

As drafted, the measure would impose a one-time 5% tax on the net worth of California residents worth more than $1 billion, with a smaller tax on those valued between $1 billion and $1.1 billion. Supporters say the revenue — potentially tens of billions of dollars — would fund state healthcare programs such as Medi-Cal, food assistance, and public education, partly to offset reductions in federal funding.

The measure has divided California's political establishment. Prominent progressives, including Senator Bernie Sanders and Representative Ro Khanna, have backed it, framing it as billionaires paying a modest share to protect essential services. Notable opponents include Governor Gavin Newsom, and business leaders who argue a wealth tax would push high-net-worth residents and investors out of the state. At least one billionaire has reportedly spent tens of millions of dollars campaigning against it. In other words, this is a genuinely contested measure with credible arguments on both sides — and its outcome is far from certain.

The residency detail that has planners talking

The feature drawing the most attention from tax and estate planners is timing. As drafted, the measure would determine California residency as of January 1, 2026, but would measure net worth as of December 31, 2026. The practical implication is unusual: an individual who was a California resident on January 1, 2026 could remain subject to the tax even if they later relocated, as long as their net worth still met the threshold at year-end.

That apparent lookback is also why many legal experts expect the measure, if passed, to face constitutional litigation that could tie up any revenue for years. Nothing about it is settled. It must first win a majority of voters in November, and would then almost certainly be tested in court.

Who this actually affects — and who it doesn't

This is the part that gets lost in the headlines, so let me be precise: Proposition 40 targets billionaires. California has roughly 200 of them. If your net worth is not measured in ten figures, this specific measure does not apply to you.

That matters because the vast majority of people buying homes in Incline Village and Crystal Bay — successful founders, executives, and families purchasing in the $2 million to $10 million range — are not in the group this tax would touch. Anyone telling you that Proposition 40 is a reason for a typical luxury buyer to leave California is overstating it. The honest read is different and more interesting: the measure is a signal, not a personal trigger for most buyers.

Why it's putting the Nevada shore in the national spotlight

Even though the tax itself is narrow, it has landed in the middle of a much bigger story that was already unfolding — a visible movement of significant wealth toward the Nevada side of Lake Tahoe.

Over the past year, the top of the Incline Village and Crystal Bay market has set records, including a reported $125 million off-market lakefront sale in Incline Village — the highest known price ever paid in the area — tied to a Silicon Valley venture investor. Other high-profile names have been linked to major North Shore and West Shore purchases. National outlets have covered the trend as a "billionaire boom," and brokers report a marked uptick in inquiries about off-market lakefront on the Nevada side.

The record sales predate the ballot measure and are driven by their own fundamentals — scarcity, privacy, and lifestyle at the very top of the market. But the concurrent debate over a California wealth tax has amplified the national attention on why so much capital is choosing Nevada-side Tahoe. The two threads are separate, but they're being told as one story: California debating how to tax extreme wealth, while some of its wealthiest residents are visibly investing across the state line.

What it means if you're considering a move

If you're a high earner weighing Nevada, here's the measured take. Proposition 40 shouldn't be the reason you move — it likely doesn't apply to you, and it may not survive the ballot box or the courts. What it does do is put a spotlight on a decision many people in your position are already evaluating for more durable reasons: Nevada has no state income tax on wages, retirement income, or capital gains, while California's top rate is among the nation's highest.

That underlying math — not any single ballot measure — is what makes the Nevada shore compelling for many buyers, alongside the lifestyle. But establishing Nevada residency is a real, documented process, not a mailing-address change, and California's Franchise Tax Board scrutinizes high earners who leave. If a move is on your mind, the right first step is a conversation with a cross-border tax professional about domicile, timing, and your specific circumstances — especially if you're anticipating a liquidity event. My role is to help you find the right home and connect you with the professionals who make a relocation sound and defensible.

Frequently asked questions

What is California Proposition 40? It is a November 3, 2026 ballot measure that would impose a one-time tax of up to 5% on the net worth of California residents worth more than $1 billion, with revenue directed to healthcare, food assistance, and education. It qualified for the ballot but still requires voter approval.

Does the California billionaire tax affect me if I'm buying a $3 million home in Incline Village? No. The measure targets individuals with a net worth exceeding $1 billion — roughly 200 people statewide. It does not apply to typical luxury homebuyers. Its relevance to most buyers is as a signal of California's broader tax direction, not a personal tax.

Would moving to Nevada let a billionaire avoid Proposition 40? Not necessarily, and this is the measure's most-discussed feature. As drafted, it would base residency on January 1, 2026 while measuring net worth at year-end, meaning some people who relocated during 2026 could still be subject to it. Anyone potentially affected should work with a tax attorney; this is not a do-it-yourself analysis.

Is Proposition 40 definitely becoming law? No. It must be approved by a majority of California voters in November 2026, and legal experts widely expect that, if it passes, it will face constitutional challenges that could delay or block it.

Why is so much wealth moving to the Nevada side of Lake Tahoe? A combination of permanently scarce lakefront supply, privacy, lifestyle, and Nevada's lack of a state income tax. Record sales in Incline Village and Crystal Bay reflect those fundamentals; the current tax debate has simply drawn more national attention to a trend already underway.

Talk to a specialist who understands both sides of the state line

I'm Cole Mizak, a Compass luxury agent and the #1 agent by individual sales volume in Incline Village for 2025, with more than $250 million in career sales. I'm dual-licensed in Nevada and California, and much of my practice is helping Bay Area executives and founders think clearly about a Nevada move — separating the headlines from what actually matters for their decision, and connecting them with the tax and legal professionals who handle the specifics.

If you're weighing Incline Village or Crystal Bay, reach out at mtnluxuryliving.com and let's talk through your goals. You may also want to read my guide to moving to Incline Village from the Bay Area and my current Incline Village market report.

Reminder: This article is general information, not tax, legal, or voting advice, and takes no position for or against any ballot measure. Consult a qualified cross-border CPA or tax attorney before making residency or transaction decisions.